Warp beam for looms



June 14, 1949. Q F. D. LINDQUIST 2,473,155

WARP BEAM FOR LOOMS Filed Sept. 50, 1948 llllllllll I I 22/ /25/ ?,o 2|

FIG.8

INVENTOR FRANK D. LINDQUIST MMTM ' ATTORNEY Patented June 14, 1949 WARP BEAM FOR LOOMS Frank D. Lindquist, Worcester, Mass'., assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application September 30, 1948, Serial No. 51,930 6 Claims. (Cl. 242-124) This invention relates to improvements in warp beams for looms and it is the general object of the invention to provide simple and efficient means for holding the warp heads securely to the beam barrel in adjusted position along the latter.

The warp of a loom is ordinarily wound on a beam which is rotatably mounted at the back of the loom and is drawn forwardly from the beam through harness frames. In recent years there has been a tendency to increase the diameter of warp beams so they can hold a large amount of warp thread suitable for weaving operations extending over several weeks. Theend-pressure of the warp threads in such beams is very high and exerts forces tending to distort the flange or heads of the beam and cause them to slide along the beambarrel.

It is an important object of the present invention to provide a warp head with a wedge which can be drawn transversely of the warp beam to exert a considerable force between the warp head and the barrel to prevent relative slippage of these parts.

It is a further object of the invention to providea warp beam with a barrel member having screw threads cut thereon .and a warp head threaded on to said screw threads and held in position by a wedge which fits the screw threads of the barrel and is so mounted that it can be moved transversely of the barrel in the general direction of the length of the screw threads to establish a tight holding relation between the warp head and the barrel.

With these and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein two forms of the invention are set forth,

Fig. 1 is an elevation of a warp beam having the preferred form of the invention applied thereto,

Fig. 2 is a vertical transverse section on line 2-2, Fig. 1

Fig. 3 is a vertical 3-3, Fig. 2, v

Fig. 4 is an enlargeddetailed horizontal section on line 4-4. Fig. 3,

longitudinal section on line Fig. 5 is a perspective view showing the form of wedge used in the preferred form of the invention,

Fig. 6 is a view similar to a portion of Fig. 2 but showing the modified form of the invention,

Fig. 7 is an enlarged detailed horizontal sectionon line 1-1, Fig. 6, and 1 Fig. 8 is a perspective view showing the wedge which is used in the modified form of the invention.

Referring particularly to Fig. 1, the warp beam designated generally at B, includes a barrel member ID, preferably a metal tube, having external screw threads H cut on each end there-- of. Each end of the barrel is provided with a warp head designated generally at H, and the left'end of the barrel may'have attached thereto a friction head l2 to cooperate with the letoff mechanism of the loom. Gudgeons l3 concentric with the barrel extend from opposite ends of the latter and afford means for mounting the beam in the warp winding machine and also in the loom. The warp heads are both alike for each form of the invention, and the description will be limited to a single head for each form, namely, the head located at the left end of the barrel.

Referring particularly to Figs. 1 to 5 the head H includes a fiange member I5 having a fiat warp thread engaging surface l6 which is perpendicular to the axis of the barrel member III.

The flange is provided with a huh I! and a plurality of radial ribs [8. The hub is internally screw threaded'as at l9 to fit the screw threads ll.

As shown more particularly in Fig. 2, the flange I5 is provided with a pocket 20 defined by right and left side walls 2| and 22 connected by a third wall or bridge 23. The latter has an inner fiat supporting surface 24 facing barrel member I0 and lying in a plane substantially parallel to the axis of the barrel Ill but spaced outwardly from member ID. This surface 24 preferably extends on both sides of a vertical plane passing through the barrel axis as viewed in Fig. 2, although this relation is not an essential for all forms of the invention.

A wedge member 25 having a fiat smooth outer surface 26 in engagement with the aforesaid surface 24 is mounted in the pocket 20 and has an internally screw threaded bore 21 in the low or narrow end thereof to receive a screw 28 freely rotatable in wall 2!. Screw 28 has a head 29 which as shown in Fig. 2 engages the outer side of wall 2 i A pin or disengaging means 30 extending through the screw 28 engages the inner surface M of the wall 2|. The relation between the screw 28 and the wedge member 25 is such that when the screw is turned in one direction it draws the wedge toward wall 2! to establish tight holding relation with member ID. When the screw is turned in the opposite direction the wedge will be moved away from well 2| due to engagement of the latter by pin 30.

As shown in Fig. the upper surface 38 of the wedge is concave and provided with a plurality of grooves 36 to match or are configured to fit the screw threads ll of the barrel in. These grooves and the ridges 81 between them may constitute true screw threads having the same pitch and diameter as the screw threads I i, or they may be formed in any other manner, as by a milling operation, so that they will have a close fit with the screw threads il without necessarily being true screw threads.

As shown in Fig. 2 the wedge 25 is located to the left of the center of the beam with the high or wide part 38 thereof adjacent to the left end of the pocket for engaging the screw threads ll. As

been turned on the screw I I to the proper position along the length of the barrel, depending upon the width of the space between the heads H for the warp. When it is desired to change the position of the head the screw 28 will be given a reverse v 4 part of the wedge,away from wall 4!, or to the right as viewed in Fig. 6. After the desired setting of the wedge has been attained the lock nut 53 is tightened.

When it is desired to loosen the wedge 45 to move the flange to a new adjusted position along the length of the barrel, the screw BI is backed off and a loosening screw 55 threaded through the right wall 41, Fig. 6, is turned in a direction to effect left hand movement of the wedge 46, or movement in a direction which will move it away from holding relation with respect to the screw thread ii.

From'the foregoing it will be seen that the invention sets forth a simple means by which the' warp head of a warp beam may be very firmly connected to the barrel M in any adjusted position along the length of the latter. The means includes-a wedge having screw threads or the like on one surface thereof configured to engage and fit the screw threads H, and means are provided for moving the wedge into tight holding relation with the screw threads of the barrel. In' the preferred form of the invention the wedge is drawn toward its holding position by screw 28,

while in the modified form of the invention the wedge is pushed or forced into holding position turn to effect loosening of the wedge 25, as al-- ready described.

The wedge has a fiat lateral surface 40 engaging a fiat surface 4| on web 42 of the flange I, as shown more particularly in Fig. 4. When the wedge 25 is set in tight position the surfaces 40 and ii engage each other so that any force acting on the lower part of the head If tending to deflect it will be resisted by the wedge. Reinforcing ribs 43 integral with the flange l5 connect with the side walls 2! and 22 and the bridge 23.

In the modified form of the invention a. warp head H, similar to head H in many respects, has a wedge very similar to that of the preferred form except that instead of being drawn into tight holding engagement with the screw threads of the barrel it is pushed or forced into such engagement. Other parts of the modified form of the invention, except the wedge, and the screws for manipulating it, may be as already described for the preferred form of the invention.

The modified wedge, shown at 45 in Fig. 8, is formed with its small end solid and without the screw threaded bore 21. In other respects wedge 45 may be similar to wedge 25. The pocket 46. similar to pocket 20, is defined between right and left side walls 41 and 48 and a bridge or third wall 49 having a flat surface 50 similar to surface 24'. Wall 48 has threaded thereto'a pressure screw 5| having a head 52 and a lock nut 53. When it is desired to establish firm holding relation between the fiange 54 of head H and the barrel member the screw Si is turned to push the wide by screw 5|. In both forms of the invention the concave surface of the wedge which faces the barrel has a configuration which will fit the screw threads H, and the wedge moves relatively to the warp head in the general direction in which the screw threads Ii extend.

Having thus described the invention it will be seen" that changes and modifications of the foregoing specific disclosure may be made without deiparting from the spirit and scope of the invenion. What is claimed as new is:

1. In a warp beam having a cylindrical barrel member provided with external screw threads.

a warp head having internal screw threads fittin the screw threads of said barrel member, means on the warp head having a fiat surface substantially parallel to the axis of said barrel member but spaced from said barrel member, a. wedge member slidable on said surface and having a concave surface configured to fit said screw threads of the barrel member, and means on the warp head to effect movement of the wedge memher along said surface relatively to said head in a direction laterally of the barrel member to force the concave surface of the wedge member into tight holding relation with the screw threads of the barrel member.

2. In a warp beam having a cylindrical barrel member provided with external screw threads, 2.

warp head having internal screw threads fitting the screw threads of said barrel member, walls on in a direction laterally of the barrel member and in the direction in which the screw threads on said barrel member extend, said wedge having a concave surface adjacent to the barrel member configured to fit the screw threads of said barrel member, and means supported in another 'of said walls efiective to move said wedge in said direction along said one wall and force the concave surface of said wedge into close holding engagement of the screw threads of said barrel member.

3. In a warp beam having a cylindrical barrel member provided with external screw threads, a warp head having internal screw threads fitting the screw threads of said barrel member, a wall on the warp head having a flat surface substantially parallel to the axis of the barrel member but spaced from the latter, a wedge slidable on said surface in the direction in which the screw threads of said barrel member extend, said wedge having a concave surface configured to engage and fit the screw threads of said barrel member,- another wall formed on said warp head, and screw means operatively related to said wedge and rotatable in said other wall to effect movement of said wedge in said direction to establish tight holding relation between said concave surface of the wedge and the screw threads of said barrel member.

4. In a warp beam having a cylindrical barrel member provided with external screw threads, a

warp head having internal screw thread fitting the screw threads of said barrel member, a wall.

formed on said warp head and having a fiat surface substantiallyparallel to the axis of the barrel member but spaced outwardly from said barrel member with respect to said axis, a wedge having a flat surface to engage said wall, said wedge having narrow and wide parts connected by a concave surface adjacent to and configured to fit the screw threads of said barrel member, and a screw mounted on said warp head and tappedinto the posite side of the second wall to cause movement of the wedge in a direction to disengage the latter from said barrel member.

small end of said wedge effective when turned in a given direction to move said wedge along said flat surface and move said concave surface into tight holding relation with respectto saidubarrel member.

6. In a warp' beam having a 'cylindrical barrel member provided with external screw threads, I

a warp head having internal screw threads fitting the screw threads of said barrel member,

three walls formed integrally with the warp head and defining a pocket, two of said walls being on opposite sides of-the pocket and the third wall connecting said two walls and having a flat surface substantially parallel to the axis'of the barrel member andspacedfrom said-barrelmember, a

wedge located in said pocket engagingsaid fiat surface .and located between said two side walls,

said wedge having a concave surface adjacent to I the barrel'member configured to fit the screw threads on said barrel member, a'screw tapped 5. In a warp beam having a cylindrical barrel member provided with external screw threads, a

warp head, having internal screw threads fitting the screw threads of saidbarrel member,- a wall formed on said warp head having a flat supporting surface facing said barrel member and substantially parallel to the axis of the barrel meminto one 'of said side wallseflfective when turned in a given direction to move said wedge along said flat surface and force said concave surface of the wedge into close holding engagement with the screw threads of said .barrel member, and a sec- 0nd screw tapped into the other side wall efiecher but spaced outwardly from said barrel member withrespect'xto said axis, a'wdge having a flat surface to engage and slide along said-supporting surface, said wedgehaving narrow and.

[wide parts connected by a concave surface adja- I cent to and configured to fit the screw threadsofv said barrelmember. a second'wall on said warp 45 member, ascrew mounted for free'rotation on said second wall and having a head enga ing a tive when turned in a given direction to-move said wedge out of holding relation with. respect to said barrelmember.

D; LIND'Q UI ST I REFERENCES crrEn The-following references are file of this "patent:

' FO IG PATENTS Number Country Date 302L076 Great Britain 44.--- Dec. 13, 1928 of recordlin the 

